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CVE-2026-6656

Estado: AplazadaAlta (7.5)—

Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.

The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Timing attack en check_password permite adivinar el hash y comprometer credenciales. AV:N/PR:N/UI:N indica explotación remota sin privilegios previos (T1190). CWE-208 (timing attack) sustenta T1212.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer GuidanceVulnerability ScanningThreat Intelligence Program

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Crypt Password — Crypt PasswordAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-6656",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6656",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-20T13:06:09.076479Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "vendor": "DRSTEVE",
          "product": "Crypt::Password",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "0.28"
            }
          ],
          "packageName": "Crypt-Password",
          "programFiles": [
            "lib/Crypt/Password.pm"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "Crypt::Password::check_password"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-07-20T07:16:42.440",
  "references": [
    {
      "url": "https://metacpan.org/release/DRSTEVE/Crypt-Password-0.28/source/lib/Crypt/Password.pm#L190-193",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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    {
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/07/20/4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
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          "lang": "en",
          "value": "CWE-208"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.\n\nThe check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash."
    }
  ],
  "lastModified": "2026-07-20T19:17:30.503",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}